Automatically Activated Blind Spot Camera System

ABSTRACT

A method is provided for automatically activating a car&#39;s side view camera during lane changes and displaying the camera feed on a dashboard mounted display, thereby eliminating blind spots and making the maneuver safer. The system can be configured to anticipate an upcoming lane change based on use of the turn signal alone, or the turn signal in combination with vehicle speed and/or determination of a second vehicle located in the primary car&#39;s blind spot. The display of the camera&#39;s data feed is terminated after completion of the lane change, where lane change completion is typically based on deactivation of the turn signal or the vehicle crossing over the lane markers.

FIELD OF THE INVENTION

The present invention relates generally to a vehicle and, moreparticularly, to a camera-based driver assistance system.

BACKGROUND OF THE INVENTION

Vehicle safety has improved dramatically over the years. Initially manyof the improvements were due to advances in the materials selected forvarious automobile components. For example safety glass, which was firstintroduced for use in cars in the 1920's, helped to reduce seriousinjuries and/or fatalities to the driver, passengers and bystanders thatoften resulted from the windshield or other vehicle windows beingshattered in a car crash. Similarly, adding padding to the passengercompartment, most notably to the surfaces of the dashboard, helpedminimize head injuries during sudden vehicle stops, especially those dueto a collision. Two of the most significant safety advancements made todate, seat belts and air bags, have been estimated to have saved over300,000 lives in the past 40 years.

While initially most vehicle safety improvements were the result ofdesign changes in individual components or vehicle subsystems, todaymany of the greatest advances in safety are the result of using acomputer to anticipate a problem and provide rapid corrective action. Insome instances the computer system is used to enhance vehicleperformance, and thus safety, exemplary systems including electronicstability control and anti-lock brakes. In other cases the computer isused to monitor vehicle and/or driver performance and activate warningswhen needed. For example, a computer-based system may be used toactivate a warning if it appears that the driver is becoming drowsy ordriving erratically, e.g., unintentionally departing from the currentlane or approaching another car/stationary object at too high a rate ofspeed or changing lanes when another car is in the driver's blind spot.It yet other systems, in addition to monitoring vehicle/driverperformance and activating warnings as deemed necessary, the computermay also be used to augment driver performance to avoid a collision, forexample by automatically initiating braking or increasing hydraulicpressure in the braking system during a panic stop. Computer systems arealso being used in today's cars to simplify the task of driving, forexample by helping the driver to safely park their car using parkingsensors and cameras.

Even though technology has been used in recent years to improve vehiclesafety, many of these computer-based systems only provide the driverwith limited information, for example a warning when the car is about tohit something while being parked. Accordingly, what is needed is a meansfor effectively and timely communicating data acquired by these systemsto the driver, while simultaneously avoiding unnecessary driverdistractions. The present invention provides such a system.

SUMMARY OF THE INVENTION

The present invention provides a method of automatically activating acar's side view camera(s), the method including the steps of (i)receiving a first indicator corresponding to an imminent lane change bythe vehicle, where the first indicator is received by a vehicle systemcontroller; (ii) automatically displaying a data feed from the side viewcamera upon receipt of the first indicator by the vehicle systemcontroller; (iii) completing the imminent lane change; (iv) receiving asecond indicator corresponding to the step of completing the imminentlane change, where the second indicator is received by the vehiclesystem controller; and (v) automatically terminating the step ofdisplaying the data feed from the side view camera after the secondindicator is received by the vehicle system controller.

In one aspect, the step of receiving the first indicator may becomprised of the step of activating the vehicle's turn signal, where theturn signal is activated by the driver. Similarly, the step of receivingthe second indicator may be comprised of the step of deactivating thevehicle's turn signal, where deactivation of the turn signal may be bythe driver or may occur automatically after the lane change iscompleted. The process may be configured to terminate the camera displaywhen the turn signal is deactivated even if the vehicle has notcompleted the lane change.

In another aspect, the method may include the step of determiningvehicle speed and comparing the vehicle's speed to a preset speed, wherethe data feed from the side view camera is only displayed upon receiptof the first indicator if the vehicle speed is greater than the presetspeed. The preset speed may be set by the vehicle's manufacturer or bythe vehicle's user.

In another aspect, the method may include the steps of monitoring ablind spot sensor mounted to the vehicle, communicating the output fromthe blind spot sensor to the vehicle system controller, and determiningif a second vehicle is located within the region observed by the blindspot sensor, where the data feed from the side view camera is onlydisplayed upon receipt of the first indicator if a second vehicle islocated within the region observed by the blind spot sensor.

In another aspect, the method may include the steps of determiningvehicle speed, comparing the vehicle's speed to a preset speed,monitoring a blind spot sensor mounted to the vehicle, communicating theoutput from the blind spot sensor to the vehicle system controller, anddetermining if a second vehicle is located within the region observed bythe blind spot sensor, where the data feed from the side view camera isonly displayed upon receipt of the first indicator if the vehicle speedis greater than the preset speed and a second vehicle is located withinthe region observed by the blind spot sensor.

In another aspect, the step of receiving the first indicator may becomprised of the step of activating either a left turn signal or a rightturn signal, and the step of displaying the data feed may be comprisedof selecting a left side view camera data feed if the vehicle's leftturn signal is activated and selecting a right side view camera datafeed if the vehicle's right turn signal is activated.

In another aspect, the step of displaying the data feed may be comprisedof displaying the data feed on either a primary display or a secondarydisplay, where the method further comprises the step of selectingbetween the primary display and the secondary display. The step ofselecting between the primary and secondary displays may be preset orperformed real-time, and may be performed by the vehicle's manufactureror by a vehicle user.

In another aspect, the step of displaying the data feed may be comprisedof displaying a left side view camera data feed and a right side viewcamera data feed.

In another aspect, the method may include the step of monitoring acurrent vehicle location relative to a plurality of lane markers, wherethe step of receiving the second indicator further comprises the step ofdetermining when the current vehicle location relative to the pluralityof lane markers indicates completion of the lane change.

In another aspect, if the vehicle does not change lanes within a presetperiod of time after initiating the camera display, then the method mayfurther include the step of automatically terminating the cameradisplay.

A further understanding of the nature and advantages of the presentinvention may be realized by reference to the remaining portions of thespecification and the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

It should be understood that the accompanying figures are only meant toillustrate, not limit, the scope of the invention and should not beconsidered to be to scale. Additionally, the same reference label ondifferent figures should be understood to refer to the same component ora component of similar functionality.

FIG. 1 provides a simplified view of a vehicle, viewed from above thecar, along with a plurality of object detection zones associated with avariety of sensor types and locations that may be used with theinvention to detect objects that are near the car as well as those thatare potentially within the car's pathway;

FIG. 2 provides the simplified view of the vehicle shown in FIG. 1,modified to include a plurality of cameras that may be used with theinvention to display relevant images to the driver based on currentconditions;

FIG. 3 provides a block diagram of the primary components utilized inthe detection and display system of the invention;

FIG. 4 illustrates the methodology associated with a preferredembodiment of the invention in which camera activation provides aidduring lane changes;

FIG. 5 illustrates the methodology associated with a preferredembodiment of the invention in which camera activation provides aid tothe driver when making a turn;

FIG. 6 illustrates preferred camera locations for an embodiment thatprovides cross traffic information to the driver;

FIG. 7 illustrates alternate camera locations for an embodiment thatprovides cross traffic information to the driver;

FIG. 8 illustrates the methodology associated with an embodiment of theinvention in which a camera's data feed is displayed when an obstacle isdetected in the vehicle's intended pathway;

FIG. 9 illustrates the methodology associated with an embodiment of theinvention in which the passenger cabin camera's data feed isautomatically displayed based on sounds within the passenger cabin;

FIG. 10 illustrates the methodology associated with an embodiment of theinvention in which the data feed from a camera is displayed based on avoice command;

FIG. 11 illustrates the methodology associated with an embodiment of theinvention in which the data feed from a camera is automaticallydisplayed on an in-cabin display based on a previous activation of thesame camera at the same location; and

FIG. 12 illustrates a modification of the methodology shown in FIG. 11.

DESCRIPTION OF THE SPECIFIC EMBODIMENTS

As used herein, the singular forms “a”, “an” and “the” are intended toinclude the plural forms as well, unless the context clearly indicatesotherwise. The terms “comprises”, “comprising”, “includes”, and/or“including”, as used herein, specify the presence of stated features,integers, steps, operations, elements, and/or components, but do notpreclude the presence or addition of one or more other features,integers, steps, operations, elements, components, and/or groupsthereof. As used herein, the term “and/or” and the symbol “/” are meantto include any and all combinations of one or more of the associatedlisted items. Additionally, while the terms first, second, etc. may beused herein to describe various steps or calculations, these steps orcalculations should not be limited by these terms, rather these termsare only used to distinguish one step or calculation from another. Forexample, a first calculation could be termed a second calculation,similarly, a first step could be termed a second step, similarly, afirst component could be termed a second component, all withoutdeparting from the scope of this disclosure.

FIG. 1 provides a simplified view of a vehicle 100, viewed from abovethe car, along with a plurality of object detection zones that may beused with the invention to detect objects that are near the car as wellas those that are potentially within the car's pathway. Although any ofa variety of sensor types may be used to define these zones, typicallyeach sensor is selected based on the desired detection range and, insome cases, the desired shape of the detection zone. Sensors that areoften used in these applications include radar, electromagnetic,ultrasonic, LIDAR (i.e., light detection and ranging) and cameras.

Zones 103 and 104 extend only a short distance, generally on the orderof a foot or two, from the front and rear bumpers, respectively, ofvehicle 100. These detection zones are primarily used during parkingmaneuvers as a means of alerting the driver of various obstacles (e.g.,trees, other cars, buildings, etc.). The sensors, either electromagneticor ultrasonic proximity sensors, that define zones 103 and 104 arecommonly integrated into the front and rear bumpers. In a conventionalvehicle when one of the sensors defining zones 103/104 detects anobject, an audible or a visible warning is activated.

In some vehicles, a secondary zone 105 is provided in front of thevehicle while a secondary zone 106 is provided behind the vehicle. Thesezones, which extend away from the car for a further distance than thatprovided by zones 103/104, are used to detect cross traffic or objectsthat may not be visible to the driver. Zones 105/106 are often ofcritical importance when moving into traffic from a blind intersection,e.g., an intersection where buildings or other objects prevent thedriver from adequately seeing traffic approaching from the left and/orthe right. Similarly, these detection zones provide the driver withinsight into approaching traffic as the driver attempts to back out of aparking space. In general, when an object is detected in zone 105 whenmoving forward, or zone 106 when moving backward, an audible or visiblewarning is activated. Typically short or medium range radar detectorsare used to define zones 105 and 106.

Blind spot detection zones 107 and 108, located on the driver's side andthe passenger's side, respectively, monitor for cars that are located inthe driver's blind spot, i.e., in a location that is difficult to viewby the driver due to mirror placement, vehicle pillars, etc. Once anobject, i.e., a car, is determined to be in one of the driver's blindspots, a visible warning indicator is illuminated on the same side ofthe car as the identified object. Thus, for example, a car detected inzone 107 will cause a warning indicator on the driver's side of the carto be illuminated while a car detected in zone 108 will cause a warningindicator on the passenger's side of the car to be illuminated.Typically the warning indicators are located within, or adjacent to, theside mirrors so that they are easily visible when the driver looks inthat direction. In other words, if the identified object is in zone 107the warning indicator on the driver's side of the vehicle isilluminated, while an object identified in zone 108 causes the warningindicator on the passenger's side of the vehicle to be illuminated. Aswith zones 105/106, typically short or medium range radar detectors areused to detect objects within zones 107/108.

Zone 109 extends in front of car 100 as well as either side, this zoneproviding lane departure warnings to the driver. Zone 109 uses a cameradetection scheme along with image recognition software that is capableof detecting the lane markers that are typically used in multi-lanehighways. When the system determines that the car is getting too closeto either side of the present lane, a lane departure warning isactivated. Generally the lane departure warning may be an indicator onthe dash or an audible warning, although in some vehicles a tactilewarning may be provided (e.g., a slight vibration in the steeringwheel). It will be appreciated that the camera sensor system used withzone 109 may also monitor other roadside conditions, e.g., stop signs,school zone signs, etc.

Some vehicles also include one or more long range zones, e.g., zones 111and 113, which typically extend hundreds of feet in front of the car.The size and shape of these zones depends at least in part on theselected sensor, e.g., long range radar versus LIDAR. In some vehiclesthe long range zones may be used to control an adaptive cruise controlsystem, i.e., a cruise control system that can automatically adjustvehicle speed in order to maintain a preset separation distance betweena car and a vehicle directly in front of it. These zones may also beused for emergency braking systems that automatically brake the car, oraugment the braking system, when the system determines that the car islikely to collide with a pedestrian or other object within its pathway.

FIG. 2 provides the simplified view of vehicle 100 shown in FIG. 1modified to include a plurality of cameras that may be used with theinvention to display relevant images to the driver based on currentconditions. As described in detail below, the current conditions used totrigger the display of the output from one of the cameras may includeboth data received from an object sensor, such as those described aboverelative to FIG. 1, or input from an activity sensor (e.g., turn signal,audio input, vehicle location, etc.). Additionally, and as noted above,these same cameras may also be used as sensing systems in order todefine detection zones. In general the vehicle surroundings may bedivided into four quadrants; front camera zone 201, rear camera zone203, driver side camera zone 205 and passenger side camera zone 207. Asingle camera with a wide angle lens may be used for each of thesezones; alternately, multiple cameras may be used in a particularzone(s). Camera zone 209 provides an internal view of the vehicle'spassenger cabin. Typically zone 209 is used to monitor the rear portionof the passenger cabin, thus allowing the driver to easily monitorpassengers, for example a baby, seated in a rear seat.

FIG. 3 provides a block diagram of an exemplary control system 300 foruse with a preferred embodiment of the invention. It should beunderstood that control system 300 is but one possible configuration andthat other configurations may be used while still retaining thefunctionality of the invention. Additionally, one or more of theelements shown in FIG. 3 can be grouped together in a single device,and/or circuit board, and/or integrated circuit. For example, and aspreviously noted, the same camera may be used both to detect a possibleobstacle as well as provide a view of that obstacle to the user.

Control system 300 includes a system controller 301 comprised of acentral processing unit (CPU) 303 and a memory 305. Preferably systemcontroller 301 also serves as the vehicle's management system. Memory305 may be comprised of EPROM, EEPROM, flash memory, RAM, a solid statedisk drive, a hard disk drive, or any other memory type or combinationof memory types. Depending upon the type(s) of display used in vehicle100 as well as the capabilities of CPU 303, controller 301 may alsoinclude a graphical processing unit (GPU) 307. CPU 303 and GPU 307 maybe separate or contained on a single chip set.

Coupled to controller 301 is an interface 309. Interface 309 allows thedriver, or a passenger, to interact with the vehicle management system,for example inputting data into the navigation system, altering theheating, ventilation and air conditioning (HVAC) system, controlling thevehicle's entertainment system (e.g., radio, CD/DVD player, etc.),adjusting vehicle settings (e.g., seat positions, light controls, etc.),and/or otherwise altering the functionality of vehicle 100. In at leastsome embodiments, interface 309 also includes means for the vehiclemanagement system to provide information to the driver and/or passenger,information such as a navigation map or driving instructions as well asthe operating performance of any of a variety of vehicle systems (e.g.,battery pack charge level for an electric car, fuel level for the enginein a hybrid or ICE-based vehicle, selected gear, current entertainmentsystem settings such as volume level and selected track information,external light settings, current vehicle speed, current HVAC settingssuch as cabin temperature and/or fan settings, etc.).

Also coupled to controller 301 is at least one display system. In apreferred embodiment, the system includes a primary display 311 and asecondary display 313. The primary display is preferably larger than thesecondary display, and is often situated in a more central locationwithin the dashboard, thus allowing it to be more visible to thepassenger. Display 311 if often used with the navigation system or as anelement of the user interface. Secondary display 313 is preferablylocated within the instrument cluster or configured as a heads updisplay (HUD), thus making it easier to observe while driving. It shouldbe understood that the invention may use a single display to present allcamera views when activated; alternately, different views may bepresented on different displays. For example, while the larger,centrally located display 311 may be ideal when the car is in reverse oris being parked, the secondary display 313 may provide easier viewingaccess when a side view camera is activated prior to changing lanes, orwhen a front view camera is activated in preparation for moving intotraffic.

In the preferred embodiment, five cameras 315-319 are connected tocontroller 301. Camera 315 provides a view of zone 201 in front of thevehicle; camera 316 provides a view of zone 203 behind the vehicle;camera 317 provides a view of zone 205 to the driver's side of thevehicle; camera 318 provides a view of zone 207 to the passenger's sideof the vehicle; and camera 319 provides a view of zone 209 within thevehicle's passenger cabin. It will be appreciated that fewer cameras maybe used by the invention if a fewer number of views are desired.Additionally, and as noted above, multiple cameras may be used for asingle zone, for example if greater resolution is desired.

Depending upon the desired capabilities for the system, and as describedin more detail below, the system may base activation of a particularcamera on the input of one or more sensors. Control system 300illustrates the sensors used in at least one preferred embodiment of theinvention. In this embodiment, sensors 321-326 correspond to variousdetection zones surrounding the vehicle. For example, front proximitysensor 321 may correspond to zone 103 or zone 105; front cross trafficsensor 322 may correspond to zone 105 or zone 109 or zone 111 or zone113; rear proximity sensor 323 may correspond to zone 104; rear crosstraffic sensor 324 may correspond to zone 106; driver side blind spotsensor 325 may correspond to zone 107; and passenger side blind spotsensor 326 may correspond to zone 108. In addition to zone detectors,control system 300 may also base camera activation on the input from avariety of sensors such as left turn signal 327, right turn signal 329,steering wheel position sensor 331, vehicle speed sensor 333, globalpositioning system (GPS) 335, and passenger cabin audio sensor 337.

FIG. 4 illustrates the methodology associated with a preferredembodiment of the invention in which camera activation provides aidduring lane changes, specifically using side view cameras to eliminateblind spots when changing lanes. Initially the driver indicates thatthey intend to change lanes (step 401). While it is possible tocontinuously display the views provided by the side view cameras317/318, i.e., views 205/207, this continuous display may be distractingto the driver during routine driving. Accordingly in this embodiment ofthe invention the side view cameras are only activated with needed.

There are a variety of techniques that may be used to sense that thedriver wishes to change lanes (step 401). In order to minimize falsepositives, preferably at a minimum the driver must activate the turnsignal, i.e., either left turn signal 327 or right turn signal 329 (step403). In at least one configuration, in addition to receiving noticethat a turn signal has been activated, prior to camera activationcontroller 301 must also receive confirmation that the car is travelingabove a preset speed (step 405), where sensor 333 provides the vehiclespeed data to the controller. The preset speed used in step 405 may bepreset by the vehicle manufacturer, although preferably the user is ableto set this speed, either directly or using a third party. By allowingthe preset speed to be adjusted by the user, the user is able toeliminate this condition by setting the preset speed to 0 mph.Alternately, the user, or other party, is able to maintain a relativelyhigh preset speed (e.g., 40 mph or higher) with the assumption thatautomatic side view camera activation is most useful when traveling athigher speeds, or based on the assumption that lane changes primarilyoccur on high speed, multi-lane highways.

In yet another configuration of this embodiment, after the driveractivates a turn signal, and prior to activating a side view camera,controller 301 verifies that there is a car in the driver's blind spot(step 407) using blind spot sensor 325/326. In this configuration ifthere is not a car present in the driver's blind spot, the side viewcamera is not activated, thereby avoiding a possible driver distraction.It should be understood that in this embodiment the system may beconfigured to require either (i) turn signal activation and a car in theblind spot, or (ii) turn signal activation, a car in the blind spot, andthe car traveling above the preset speed as described above.

Once the conditions required to indicate that an imminent lane change isdesired have been met (step 401), then controller 301 automaticallydisplays the side view camera information (step 409), thus making thedriver's upcoming lane change safer by eliminating a blind spot in thedriver's vision. Preferably only the side view corresponding to thedesired lane change direction is presented, i.e., if the user activatesthe left turn signal 327 then the driver side camera 317 is activated inorder to provide the driver with view 205, and conversely if the useractivates the right turn signal 329 then the passenger side camera 318is activated in order to provide the driver with view 207. In analternate configuration, in step 409 both side view camera 317/318 areactivated.

In the preferred embodiment, in step 409 controller 301 displays thedata feed from the desired camera on the secondary display screen 313,thus allowing the driver to maintain a forward looking position.Alternately, the camera's data feed may be displayed on primary displayscreen 311. It will be appreciated, however, that if the primary display311 is centrally located in the dashboard and the driver is attemptingto change lanes to the driver's left side, making the driver look to theright towards the center of the dashboard is counter-intuitive. Assumingthat there are multiple displays available as described above (e.g.,displays 311 and 313), preferably the selection of the display ispreset, for example by the manufacturer or by the user; alternately, thesystem may be configured to allow the user to select the display inreal-time.

After completion of the lane change maneuver (step 411), controller 301terminates the step of displaying the side view camera data (step 413).Controller 301 can be configured to utilize a variety of data in makingthe determination that the lane change has been completed. For example,deactivation of the turn signal (step 415) may be taken as evidence thatthe lane change has been completed. A benefit of basing displaytermination (step 413) on turn signal deactivation (step 415) is that ifthe user simply decides not to change lanes and turns off their turnsignal, then the controller will terminate the side camera display eventhough in reality a lane change was not completed.

If the vehicle is equipped with a lane departure warning system asdescribed above (e.g., sensor 322), than rather than using turn signaldeactivation to indicate that the lane change has been completed oraborted, completion of the desired lane change (step 417) may be used toindicate to the controller that the display of the side view camera datashould be terminated (step 413). In this configuration, once controller301 determines that the vehicle has passed over the lane markers intothe adjacent lane using the data from a lane monitoring system (e.g.,sensor 322), then the controller terminates the step of displaying sideview camera data.

It will be appreciated that in some situations the driver may decide notto change lanes. For example, the driver may see that due to trafficconditions the present lane is preferred. Alternately, once the sideview camera feed is displayed, the driver may realize that there is acar in the blind spot and is thus unable to complete the desired lanechange. The system can be configured to adapt to a situation where thelane change is not completed in a variety of ways. In one configuration,if the user deactivates the turn signal then the side view camera feedis terminated, deactivation occurring even if the lane change was notcompleted. In an alternate configuration, once activated the side viewcamera remains on for a preset period of time regardless of whether ornot the lane change is completed. The preset period of time may be setby the vehicle's manufacturer, the driver, or a third party. In yetanother configuration, the system's response depends on whether the turnsignal activated in step 403 was a ‘turn’ signal (i.e., continuousblinking until deactivated) or a ‘lane change’ signal (i.e., blinks alimited number of time, typically three, or for a limited period oftime). In this configuration the system may terminate the camera feed ifthe turn signal is used and then deactivated, and not terminate thecamera feed until the car actually changes lanes if the lane changesignal is used.

FIG. 5 illustrates the methodology associated with a preferredembodiment of the invention in which camera activation provides aid tothe driver when making a turn and, more specifically, helps minimize thedangers associated with entering into cross traffic by providing thedriver with additional views of the on-coming traffic. Initially thedriver indicates that they intend to turn a corner (step 501). While itis possible to continuously display the views provided by the side viewcameras 317/318 (i.e., views 205/207) and/or the front view camera 315(i.e., view 201), providing a continuous camera display may bedistracting to the driver during routine driving. Accordingly in thisembodiment of the invention the cameras are only activated with needed.

Preferably in this embodiment routine cornering, i.e., steering to theleft or right, is distinguished from turning into a corner where crosstraffic may be present and where the additional views provided byon-board cameras may aid the driver in negotiating that traffic. Thereare a variety of techniques that may be used to sense that the driverwishes to turn a corner, potentially into traffic (step 501). In orderto minimize false positives, preferably at a minimum the driver mustactivate the turn signal, i.e., either left turn signal 327 or rightturn signal 329 (step 503). In at least one configuration, in additionto receiving notice that a turn signal has been activated, prior tocamera activation controller 301 must also receive confirmation that thecar is traveling below a preset speed (step 505), where sensor 333provides the vehicle speed data to the controller. The preset speed usedin step 505 may be preset by the vehicle manufacturer, althoughpreferably the user is able to set this speed, either directly or usinga third party. By allowing the preset speed to be adjusted by the user,the user is able to eliminate this condition by setting the preset speedto a very high speed (e.g., 100 mph). The use of a relatively low speed(e.g., 10 mph or lower) in step 505 provides a means for distinguishingbetween the car changing lanes on a multi-lane highway and merging intotraffic where the additional views provided by the on-board cameras maybe useful. In at least one configuration, the preset speed used in step505 is set to 0 mph so that the additional camera views provided by thisembodiment are only activated when the car stops, for example at a stopsign or a stop light, in preparation for making a turn into traffic.Rather than use 0 mph, the value set for the preset speed may beslightly above 0 mph (e.g., 2 mph), thus taking into account the‘rolling stop’ performed by many drivers.

Once the conditions are met that indicate that the driver is attemptingto turn a corner or otherwise merge into traffic (step 501), thencontroller 301 automatically displays the camera information from thepreselected cameras (step 507). During step 507, preferably the cameradata from both side cameras 317 and 318 is displayed; more preferablythe camera data from side cameras 317/318 as well as the data from frontcamera 315 is displayed. It should be understood that the cameralocations shown in FIG. 2 are only illustrative, and that other cameralocations may be used. For example, FIG. 6 illustrates an embodiment inwhich two cameras are used, with camera 601 providing front and driverside views of zone 602, and camera 603 providing front and passengerside view of zone 604. It will be appreciated that by moving the cameralocations forward from those shown in FIG. 2, and in particular forwardof the driver's position within vehicle 605, an improved cross trafficview is provided to the driver. Preferably cameras 601/603 are locatedwithin the front lighting assemblies, thus hiding them from casualobservation. FIG. 7 illustrates yet another configuration in whichcameras 701 and 703 provide left and right views, respectively, whilecamera 705 provides a view of forward zone 707. Preferably the viewsprovided by these cameras have minimal or no overlap, thus minimizingdriver confusion. It should be understood that the cameras shown inFIGS. 6 and 7 are those preferably used to provide cross trafficinformation to the driver, and that either of these configurations mayutilize other cameras as well (e.g., blind spot cameras, rear facingcamera, in-cabin camera, etc.).

Preferably controller 301 displays the data feed from the preselectedcamera(s) on the secondary display screen 313, thus allowing the driverto maintain a forward looking position while still benefiting from theadditional information provided by the cameras. Alternately, thecameras' data feed may be displayed on primary display screen 311.Assuming that there are multiple displays available as described above(e.g., displays 311 and 313), preferably the selection of the display ispreset, for example by the manufacturer or by the user; alternately, thesystem may be configured to allow the user to select the display inreal-time.

After completion of the turn (step 509), controller 301 terminates thestep of displaying the selected camera data (step 511). In at least oneembodiment, deactivation of the turn signal (step 513) is used toindicate that the turn has been completed. Alternately, controller 301may monitor the position of the steering wheel using sensor 331, basingthe decision to terminate displaying the camera data feed on thesteering wheel first rotating sufficiently to indicate that a turn isbeing made and then rotating back to the nominal center positionindicating that the car is traveling forward in approximately astraight-ahead direction (step 515). Alternately, controller 301 maymonitor vehicle speed using sensor 333, basing the decision to terminatedisplaying the camera data feed on the car returning to a higher speed,i.e., greater than a preset speed (step 517).

FIG. 8 illustrates the methodology associated with a preferredembodiment of the invention in which a camera's data feed is displayedwhen the controller 301 determines that there is an obstacle in thevehicle's intended pathway. Preferably in this embodiment the system isactive whenever the car is in motion. Alternately, the system can beconfigured to be active whenever the car is turned on, i.e., enginerunning in an ICE-based vehicle or power on in an electric/hybridvehicle. Alternately, the system can be configured to allow the user toeither turn on or turn off the feature at will, thus allowing individualusers determine when to utilize the system.

Once the system is active (step 801), controller 301 continuallymonitors for potential obstacles in the direction of travel (step 803).Therefore if the car is traveling in a forward direction, controller 301is monitoring the forward pathway using front sensors 321 and 322;alternately, if the car is traveling backwards then controller 301monitors the rearward pathway using rear sensors 323 and 324. Regardlessof whether the car is traveling forwards or backwards, if the car ismoving in a non-straight path, controller 301 also monitors side-viewsensors (e.g., sensors 325 and 326) for obstacles that may be in thevehicle's pathway while turning.

Whenever an obstacle is detected (step 805), controller 301 thendetermines whether or not the obstacle is in the vehicle's pathway (step807). If the obstacle is not in the vehicle's pathway (step 809), thenthe system simply continues to monitor for potential obstacles (step803). If controller 301 determines that the obstacle may be in thevehicle's pathway (step 811) then the camera feed that shows thatobstacle is automatically displayed (step 813). Accordingly if the caris moving forward in a relatively straight direction, then zone 201 fromforward camera 315 is automatically displayed when the obstacle isdetected; similarly, if the car is moving backward in a relativelystraight direction, then zone 203 from rear camera 316 is automaticallydisplayed when the obstacle is detected; similarly, if the car isturning while moving forward than the appropriate camera feeds areautomatically displayed (e.g., zones 201 and 205 if the car is movingforward while turning left; zones 201 and 207 if the car is movingforward while turning right; zones 203 and 205 if the car is movingbackward while turning left; and zones 203 and 207 if the car is movingbackward while turning right).

In step 813 in which the camera feed that shows the obstacle isdisplayed, preferably controller 301 displays the data feed on thesecondary display screen 313, thus allowing the driver to maintain aforward looking position while still benefiting from the additionalinformation provided by the cameras. Alternately, the cameras' data feedmay be displayed on primary display screen 311. Assuming that there aremultiple displays available as described above (e.g., displays 311 and313), preferably the selection of the display is preset, for example bythe manufacturer or by the user; alternately, the system may beconfigured to allow the user to select the display in real-time.

Once a potentially blocking obstacle is detected (step 811) and theappropriate camera feed is displayed (step 813), controller 301continues to monitor the obstacle to determine if it is still in thevehicle's pathway (step 815). As long as the obstacle remains in thevehicle's path (step 815), the controller continues to display the datafeed from the appropriate camera (step 813). Once the obstacle is nolonger in the vehicle's pathway (step 817), for example because theobstacle has moved or because the vehicle changes direction, then thecamera data feed is terminated (step 819) and the system goes back tomonitoring for obstacles.

FIG. 9 illustrates the methodology associated with a preferredembodiment of the invention in which the data feed from camera 319 inthe passenger cabin is automatically displayed based on sounds withinthe passenger cabin. This embodiment is especially useful for parentswith small children as it allows them to monitor their child in certainsituations without stopping the car or turning around in the driver'sseat, thereby avoiding the creation of a potentially unsafe condition.Preferably in this embodiment the system is active whenever the car isin motion. Alternately, the system can be configured to be activewhenever the car is turned on, i.e., engine running in an ICE-basedvehicle or power on in an electric/hybrid vehicle. Alternately, thesystem can be configured to allow the user to either turn on or turn offthe feature at will, thus allowing individual users determine when toutilize the system.

Once the system is active (step 901), controller 301 continuallymonitors the passenger cabin using audio sensor 337 (step 903). In atleast one configuration, audio sensor 337 is directional and ispositioned to favor sound pick-up from the rear portion of the passengercabin. Whenever a sound is heard within the passenger cabin (step 905),controller 301 determines whether or not the sound level is above apreset volume (step 907). Step 907 allows the system to distinguishbetween routine background noise such as traffic noise intruding intothe passenger cabin or normal passenger conversations and sounds thatare intended to trigger the camera display. If the detected sound levelis below the preset level (step 909), then the system simply continuesto monitor the sound level within the passenger cabin (step 903). Thepreset volume level used in step 907 may be preset by the vehiclemanufacturer, although preferably the user is able to set this volumelevel, either directly or using a third party. By allowing the presetvolume level to be adjusted by the user, the user is able to determinethe operational sensitivity of the system.

In one configuration, if controller 301 determines that the detectedsound level is greater than the preset level (step 911), then the camerafeed from the passenger cabin camera 319 is automatically displayed(step 913, following optional process step 914). In the preferredembodiment, however, once the volume level exceeds the preset level(step 911) the controller uses sound recognition software (step 915) toanalyze the detected audio and determine whether or not it is of anature that should trigger the in-cabin camera, e.g., a baby crying. Thesound recognition software may utilize sound patterns preset by thevehicle's manufacturer or a third party. In at least one configuration,the user is able to select the sound patterns used by the soundrecognition software. In at least one other configuration, the user isable to preset the sound patterns, for example by recording soundpatterns that they wish the software to recognize (e.g., the sounds oftheir own baby crying).

If the sound pattern is not recognized (step 917), then the systemsimply continues to monitor the sound level within the passenger cabin(step 903). If the sound pattern is recognized as a triggering pattern(step 919), then the camera feed from the passenger cabin camera 319 isautomatically displayed (step 913). Preferably the camera feed frompassenger cabin camera 319 is displayed on the primary display 311, thusmaking it easily viewed by either the driver or the passenger, assumingthat display 311 is centrally mounted in the dashboard. Alternately, thecameras' data feed may be displayed on secondary display screen 313.Assuming that there are multiple displays available as described above(e.g., displays 311 and 313), preferably the selection of the display ispreset, for example by the manufacturer or by the user; alternately, thesystem may be configured to allow the user to select the display inreal-time.

Once the in-cabin camera feed is being displayed (step 913), preferablycontroller 301 monitors the length of time that the display has beenactive and compares that time to a preset time interval (step 921). Aslong as the monitored length of time is less than the preset timeinterval (step 923), the in-cabin camera feed continues to be displayed(step 913). Once the length of time exceeds the preset time interval(step 925), then the camera data feed is terminated (step 927) and thesystem goes back to monitoring the sound level within the passengercabin (step 903). Preferably the preset time interval used in step 921may be preset by the vehicle manufacturer, the user or a third party.Step 921 insures that once triggered, the in-cabin camera feed is notdisplayed indefinitely.

FIG. 10 illustrates the methodology associated with a preferredembodiment of the invention in which the data feed from a camera isdisplayed based on a voice command. Preferably in this embodiment thesystem is active (step 1001) whenever the car is in motion. Alternately,the system can be configured to be active whenever the car is turned on,i.e., engine running in an ICE-based vehicle or power on in anelectric/hybrid vehicle. Alternately, the system can be configured toallow the user to either turn on or turn off the feature at will, thusallowing individual users determine when to utilize the system.

The voice command embodiment may be configured to utilize any of severaldifferent techniques for determining when to employ the speechrecognition system used in step 1003. For example, in one configurationthe system requires the user to toggle a switch 339 that, once toggled,indicates to controller 301 that the user is going to issue a voicecommand (step 1005). Switch 339 may be mounted on the steering wheel,dashboard or other location. Once toggled, controller 301 uses thespeech recognition system to determine the nature of the command (step1003). Alternately, rather than waiting for the user to toggle switch339, controller 301 may be configured to continually monitor thepassenger cabin for issued voice commands using audio sensor 337 (step1007). Then, whenever audio is detected (step 1009), controller 301 mayuse the speech recognition system to determine what command, if any, hasbeen issued (step 1003). Alternately, whenever audio is detected (step1011) the system can be configured to compare the volume level of thedetected sound to a preset level (step 1013). In this configuration thesystem only proceeds to the speech recognition step (i.e., step 1003) ifthe volume of the detected sound exceeds a preset level (step 1015),thereby helping to minimize false positives by distinguishing betweenroutine background noise and voice commands

During step 1003, the speech recognition system is used to determine theexact nature of the user's command. Preferably the user is able todisplay the data feed from any available camera simply by issuing thecorrect command. For example, the system may be configured to accept thecommand “show driver side camera” for camera 317, “show passenger sidecamera” for camera 318, “show forward camera” for camera 315, “show rearcamera” for camera 316, and “show in-cabin camera” for cabin 319. Itwill be appreciated that these are exemplary commands and that othercommand language may be used to activate and display a particularcamera. Once a command has been recognized by the system (step 1017),including identification of a particular camera, then the selectedcamera feed is displayed, either on display 311 or 313 (step 1019).Preferably the selection of the display, i.e., either display 311 ordisplay 313, is preset in the system. Alternately, the system may beconfigured to allow the user to instruct the system as to which displayto use, e.g., “show the passenger side camera on the center display”.

After the desired camera feed is being displayed (step 1019), preferablycontroller 301 monitors the length of time that the display has beenactive and compares that time to a preset time interval (step 1021). Aslong as the monitored length of time is less than the preset timeinterval (step 1023), the desired camera feed continues to be displayed(step 1013). Once the length of time exceeds the preset time interval(step 1025), then the camera data feed is terminated (step 1027) and thesystem is re-initialized (step 1001). Preferably the preset timeinterval used in step 1021 may be preset by the vehicle manufacturer,the user or a third party. Step 1021 insures that once triggered, thecamera feed is not displayed indefinitely.

In an alternate configuration, after the desired camera feed is beingdisplayed (step 1019), the system reverts to monitoring for voicecommands (step 1029). As previously noted, the system may continuouslymonitor for voice commands (step 1007) or may require that the usertoggle switch 339 (step 1005), thereby indicating to controller 301 thatthe user is going to issue a voice command In this configuration thesystem does not terminate the display of the indicated camera feed basedon elapsed time, rather the system waits until the user issues adeactivation command that is recognized in step 1003 (step 1031). Once arecognized deactivation command is received, the system terminates thecamera data feed (step 1033). It will be appreciated that the system maybe configured to accept any of a variety of deactivation commands, suchas “stop showing the driver side camera” or “terminate camera display”,etc.

FIG. 11 illustrates the methodology associated with a preferredembodiment of the invention in which the data feed from a camera isautomatically displayed on an in-cabin display based on a previousactivation of the same camera at the same geographic location. Forexample, the vehicle may be routinely parked in a garage where thegarage door is barely larger than the width of the car. Under thesecircumstances the driver may find it useful to activate side cameras 317and 318. This embodiment allows the system to automatically activate theside cameras based on a previous activation of those same cameras atthat same location.

In this embodiment the system is active whenever the car is inmotion/turned on or whenever the feature is turned on (step 1101). Then,when the user activates a particular camera (step 1103) in order todisplay the data feed from the selected camera, controller 301identifies the current location (step 1105) using GPS 335. The user mayselect and activate the camera using a voice command (step 1107) or acamera activation switch (step 1109). Controller 301 then records inmemory 305 both the identity of the activated camera, assuming that thecar has more than one camera, and the location where the camera wasactivated (step 1111). Similarly, when the user deactivates the camera(step 1113), for example using a voice command (step 1115) or a cameradeactivation switch (step 1117), controller 301 identifies the currentlocation (step 1119) and records in memory 305 both the identity of thedeactivated camera and the location where the deactivation occurred(step 1121).

After controller 301 has recorded in memory one or more locations wherethe user has activated a specific camera display, the systemcontinuously monitors the vehicle's location (step 1123) and comparesthe current location to those locations recorded in memory 305 (step1125). Whenever a current location matches up to a location stored inmemory 305 in which the user had previously activated a camera (step1127), then controller 301 automatically activates the same camera (step1129). The system continues to monitor the vehicle's location (step1131) and then deactivates the camera (step 1133) whenever the currentlocation matches up to the location stored in memory 305 in which theuser had previously deactivated the camera (step 1135).

It will be appreciated that there may be times when the user wants toactivate a camera without the system recording theactivation/deactivation of the camera. Accordingly in a preferredembodiment, the user is able to activate a ‘learning’ mode. As shown inFIG. 12, in this configuration the system can be placed in the learningmode in step 1201. If the user activates the learning mode (step 1203),then the procedure follows that described above relative to FIG. 11. Ifthe user does not activate the learning mode (step 1205), then thesystem by-passes steps 1103-1121. In this mode the system simplymonitors vehicle location (step 1123) and activates/deactivates camerasbased on previously learned behavior.

Systems and methods have been described in general terms as an aid tounderstanding details of the invention. In some instances, well-knownstructures, materials, and/or operations have not been specificallyshown or described in detail to avoid obscuring aspects of theinvention. In other instances, specific details have been given in orderto provide a thorough understanding of the invention. One skilled in therelevant art will recognize that the invention may be embodied in otherspecific forms, for example to adapt to a particular system or apparatusor situation or material or component, without departing from the spiritor essential characteristics thereof. Therefore the disclosures anddescriptions herein are intended to be illustrative, but not limiting,of the scope of the invention.

What is claimed is:
 1. A method of automatically activating a side viewcamera mounted to a vehicle, the method comprising the step of:receiving a first indicator, wherein said first indicator corresponds toan imminent lane change by the vehicle, and wherein said first indicatoris received by a vehicle system controller; displaying a data feed fromthe side view camera upon receipt of said first indicator by saidvehicle system controller, wherein said displaying step is performedautomatically by said vehicle system controller; completing saidimminent lane change by the vehicle; receiving a second indicator,wherein said second indicator corresponds to said step of completingsaid imminent lane change, and wherein said second indicator is receivedby said vehicle system controller; and terminating said step ofdisplaying said data feed from the side view camera, wherein saidterminating step is performed after said second indicator is received bysaid vehicle system controller, and wherein said terminating step isperformed automatically by said vehicle system controller.
 2. The methodof claim 1, wherein said step of receiving said first indicator furthercomprises the step of activating a vehicle turn signal, and wherein saidstep of activating said vehicle turn signal is performed by a driver ofthe vehicle.
 3. The method of claim 2, wherein said step of receivingsaid second indicator further comprises the step of deactivating saidvehicle turn signal.
 4. The method of claim 3, wherein said step ofdeactivating said vehicle turn signal is performed automatically by thevehicle after the vehicle performs said step of completing said imminentlane change.
 5. The method of claim 3, wherein said step of deactivatingsaid vehicle turn signal causes performance of said terminating stepeven if said step of completing said imminent lane change is notperformed.
 6. The method of claim 1, further comprising the steps of:determining a vehicle speed; and comparing said vehicle speed to apreset speed, wherein said step of displaying said data feed from theside view camera is only performed upon receipt of said first indicatorif said vehicle speed is greater than said preset speed.
 7. The methodof claim 6, further comprising the step of setting said preset speed,wherein said step of setting said preset speed is performed by a vehiclemanufacturer.
 8. The method of claim 6, further comprising the step ofsetting said preset speed, wherein said step of setting said presetspeed is performed by a vehicle user.
 9. The method of claim 1, furthercomprising the steps of: monitoring a blind spot sensor mounted to thevehicle, wherein an output of said blind spot sensor is communicated tosaid vehicle system controller; and determining if a second vehicle islocated within a region observed by said blind spot sensor, wherein saidstep of displaying said data feed from the side view camera is onlyperformed upon receipt of said first indicator if said second vehicle islocated within said region observed by said blind spot sensor.
 10. Themethod of claim 1, further comprising the steps of: determining avehicle speed; comparing said vehicle speed to a preset speed;monitoring a blind spot sensor mounted to the vehicle, wherein an outputof said blind spot sensor is communicated to said vehicle systemcontroller; and determining if a second vehicle is located within aregion observed by said blind spot sensor, wherein said step ofdisplaying said data feed from the side view camera is only performedupon receipt of said first indicator if said vehicle speed is greaterthan said preset speed and if said second vehicle is located within saidregion observed by said blind spot sensor.
 11. The method of claim 1,wherein said step of receiving said first indicator further comprisesthe step of activating a vehicle turn signal, wherein said vehicle turnsignal corresponds to either a vehicle left turn signal or a vehicleright turn signal, and wherein said step of displaying said data feedfurther comprises the step of selecting a left side view camera datafeed if said vehicle turn signal corresponds to said vehicle left turnsignal and selecting a right side view camera data feed if said vehicleturn signal corresponds to said vehicle right turn signal.
 12. Themethod of claim 1, wherein said step of displaying said data feed fromthe side view camera further comprises the step of displaying said datafeed on either a primary display or a secondary display, wherein saidmethod further comprises the step of selecting between said primarydisplay and said secondary display.
 13. The method of claim 12, whereinsaid step of selecting between said primary display and said secondarydisplay is preset and performed by a vehicle manufacturer.
 14. Themethod of claim 12, wherein said step of selecting between said primarydisplay and said secondary display is performed by a vehicle user. 15.The method of claim 12, wherein said step of selecting between saidprimary display and said secondary display is preset by a vehicle user.16. The method of claim 1, wherein said step of displaying said datafeed further comprises the step of displaying a left side view cameradata feed and a right side view camera data feed.
 17. The method ofclaim 1, further comprising the step of monitoring a current vehiclelocation relative to a plurality of lane markers, wherein said step ofreceiving said second indicator further comprises the step ofdetermining when said current vehicle location relative to saidplurality of lane markers indicates performance of said step ofcompleting said imminent lane change.
 18. The method of claim 1, whereinif said step of completing said imminent lane change is not performedwithin a preset period of time after performing said step of displayingsaid data feed, then said method further comprises the step ofautomatically terminating said step of displaying said data feed fromthe side view camera.